$footColor: "#333";
$footActiveColor: "#2979ff";
$whiteColor: "#fff";
$blueColor: "#2979ff";
$pageBg: "#f5f5f5";
.flex {
	display: flex;
}
.flex-column {
	flex-direction: column;
}
.flex-between {
	display: flex;
	justify-content: space-between;
	align-items: center;
}
.flex-around {
	display: flex;
	justify-content: space-around;
	align-items: center;
}
.flex-center {
	display: flex;
	justify-content: center;
	align-items: center;
}
.border-box {
	box-sizing: border-box;
}